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UNITED STATES PATENT OFFICE.

THOMAS CARROLL, OF DAYTON, OHIO, ASSIGNOR TO THE NATIONAL CASI-I REGISTER COMPANY, OF DAYTON, OHIO, A CORPORATION OF OHIO, (INCORPORATED IN 1906.)

CASH-REGISTER.

Application led January 27, 1913.

To all whom t may concern Be it known that I, THOMAS CARROLL, a citizen of the United States, residing at Dayton, in the county of Montgomery and State of Ohio, have invented certain new and useful Improvements in Cash-Registers, of which I declare the following to be a full, clear, and exact description.

This invention relates to multiple totalizer cash registers and one of the objects of the invention is to provide improved differential mechanism for selecting desired ones of the totalizers for operation.

Another object of the invention is to provide improved key controlled positive differential mechanism for operating totalizing devices.

Another object of the invention is to provide improved positively,operated transfer mechanism.

Another object of the .invention is'to provide transfer vmechanism cooperating with complementary movable members one of which is an actuator for accounting devices, which transfer mechanism controls certain relative movements between the said members for' the purpose of effecting carrying operations.

Another object of the invention is to provide a construction of differential mechanism adapted to operate simultaneously a plurality of totalizers and to eect carrying operations therein by additional movements of the differential mechanism, but still wherein the additional movements effect only the desired totalizer or totalizers.

Another object of the invention is to provide an improved indicator setting mechanism.

Another object of the invention is to provide key controlled means for selecting forV operation a totalizer from a plurality of totalizers, by a minimum movement of the totalizers.

Another object of the invention is to provide improved mechanism for determining the duration of engagement between the totalizers and their actuating devices for purposes of addition or total printing.

lVith these and incidental objects in view,l

the invention consists in certain novel' features of construction and combinations of parts, the essential elements of which are set forth in the appended claims, and a preferred form of embodiment of which is Specification of Letters Patent.

Patented oct. 31, 1916.

Serial No. 744,437.

hereinafter described with reference to the drawings which accompany and form part of the specification.

Figure 1V is a transverse vertical section of a registering machine constructed according to the invention. This view represents a section at the side of one of the banks of value keys. Fig. 2 is a similar sectional View taken at the side of a bank of keys for controlling total and subtotal printing operations. F ig. 3 is a similar section taken at the side of a bank of department keys controlling the selection of totalizers. Fig. 4 represents a view in elevation of the right side of the machine with the casing re- 'moved. Fig. 5 is a front elevation of the left hand side of the'machine showing the slip printing mechanism. Fig. 6 is a transverse vertical section in left elevation of the machine taken on the line (3*6 of Fig. 5. Fig. 7 is an enlarged detail of one section of the differential mechanism and totalizving devices controlled thereby. Fig. 7A is an enlargedvdetail view of the main totalizer and coperating mechanism.k Fig. 7B is a sectional detail of the totalizer taken on the line A-A of Fig. 7C. Fig. 7C is a detail in front elevation of one denominational section of the main totalizer. Fig. 7D is a detail showing how movement of a totalizer is limited on resetting operations. Fig. 8 is a detail in right side elevation of the multiple totalizer unit. Fig. 9 represents a left side elevation of said totalizer unit. Fig. 10 is a fragmentary front view partly in section of the left end Aof the multiple totalizer unit. Fig. 11 is a detail in right side elevation of part of the key release mechanism and the mechanism under the control of a bank of total printing keys which is employed to release the differential mechanism on total printing operations; Fig. 12 represents a front view of the pitmen for controlling engagement of the totalizers with their actuators, and the cams for operating said pitmen. Fig. 13 is a right side elevation of the mechanism for engaging the totalizers with their operating devices.. Fig. 14 is a view similar to Fig. 13 but showing only that part of the selecting mechanism lwhich is employed to engage the totalizers with their actuating devices when additions are.made to the totalizers. Fig. 15 shows that part of the tota-lizer selecting mechanism which is employed when subtotals are the movement of eachp Aprinted by the machine printed as controlled by the totalizersl Fig. 16 is a view showing that part ofy the selecting mechanism which is employed when totals are printed and the totalizers are reset. Fig. 17 is a plan view of a sales slip supporting table. Fig. 18 represents a left side view of an adjustable stop device for the sales slip. Fig. 19 is a detailin right side elevation of gearing by which differential movement is transmitted to type carriers, and which permits the type carriers to remain inset positions for a desired length of timeafter the differential mecha- Vnism of the machine is restored to normal position. Fig. 20 is a detail in left side elevation of the sales slip feeding mechanism. Fig. 21 shows details of a sales slip as but before-the stub part is cut from the remainder of the slip. Fig. 22 is a transverse veitical section showing indicator setting mechanism but with the differential mechanism modified to be movable vertically instead of horizontally as shown in the remaining views, and also to operate atotalizing device different in design fiom that shown in the remaining views. Fig. 23 is a detail in left side elevation of the mechanism for driving the differential mechanism shown in Fig. 22.`

The cash register shown in the drawings is constructed to add item amounts on se* lected ones of department totalizers and on one. grand totalizing device. A printing mechanism is provided wherein these items are printed in triplicate on inserted sales slips. The type carriers are set by .the differential mechanism of the machine, normally controlled by banks of keysibut which may be controlled by the totalizing devices for the purpose of setting the type carriers to print totals.

The differential mechanism employed in the present invention comprises a plurality of pairs of members, dierentially movable with respect to each other, but the total of air is constant. There is one pair of mem ers or slides for eachbank of keys and the keys control the relative movement between the members so that upon the movement of the slides one of them may actuate to the desired extent, a corresponding element or elements in totalizing devices. The slides of each pair are driven in the same direction by a pinion located between and in engagement with racks carried by the slides. The pinions are loosely journaled on a. shaft which is reciprocated radially to its axis and consequently moves the pinions bodily so that they carry both of the slides in the same direction. The slides are providedwith stepped shoulders which are engaged, and the slides thereby stopped, by depressed keys. The steps on the ltwo, slides normally are in such relative location to each other that when thestep onf carried by the slides.

shaft may be designed to bring this shaft to' limits of its movement as gradually as desired. This mechanism therefore obviates all possibility of overthrow or una stop at the due strain therein or in the devices operated thereby. For the same reason it is well adapted for positioning multiple totalizer units, such as reels, for the purpose of selecting a totalizer for operation. Heretofore no multipleA totalizer selecting mechanism has been provided which is well adapted for differentiallyirotating a totalizer carrying reel by power supplied from the main drive shaft of the machine. considerable necessary its consequent inertia.

As above stated the stepped slides are controlled in their forward movement by the keys. Then these slides are at rest in their eXtreme forward position, the desired totalizer or totalizers are engaged with rack teeth cut in one of the slides, slides are lreturned to normal position by the return movement of the aforesaid pinion supporting shaft and in this manner the veX- tent of differential movement of one of the slides is communicated to the totalizing devices. The slides are stopped in their zero. positions by small pivoted levers or plates which are in position to be engaged by pins By arranging the totalizer pinions to control adjustment of the said levers or plates iangularly, relative movement between the slides on their return may be controlled ing carrying operations from one totalizer pinion to another.

weight of the reel and construction is also provided wherein two totalizing devices maybe simultaneously` the remaning slide will not engagev differential mechanisml and then the for the purpose of effect-fv Thus if one slide is stopped one unit of its lmovement before it out ,the use of' This was due to the actuated by the same set of actuators which have the additional unit of movement for purposes of transferring, but still do not prevent independent transfer operations in each totalizer.- The particular method employed fo`r accomplishing this end'is that while a transfer operation is taking place in one totalizer the other totalizer is moved bodily with the rack which is effecting the transfer andv consequently the transfep occurs only in the tot-alizer which remains stationary. Then the latter totalizer is unmeshed from the racks and the totalizer which has not yet performed a possible required carrying operation is -returned to its normal position and is thus moved relatively of its actuating racks and at ysuch time may be rotated for eEecting transfers, as explained in detail farther on.

Driving mecznz'sm.-In Fig. -l are shown the two main drive shafts 1 and 2 geared to a pinion 3 fast to a crank 4. A large intermediate gear 5 pivoted on a stub shaft 6 serves to transmit motion from pinion 3 to a gear fast to shaft 1 and a gear 8 fast to shaft 2. Each operation" of the machine reuires one rotation of shafts 1 and 2, consequently from the gear ratio shown in Fig. 4 it is necessary to revolve the crank handle twice to effect this single rotation of the drive shafts.

At the end of an operation the driving mechanism is stopped at the proper position by a pawl 9 engaging a shouldered plate 10 riveted to. gear '4'. is this pawl normally prevent-s forward rotation of the driving mechanism, in order torelease the driving mechanism the crank is moved backward slightly thus causing the shouldered plate 10 to move forward slightly 'and thereby release pawl 9 which then moves upwardly as urged by its spring 11. Then the crank is caused to make two rotations in a forward direction at the end of which time a pin 12 on gear 7 strikes a bent extension 13 of pawl 9, rocking-the pawl back into stopping position.

-Keyboawi.-The operatingmechanism of the machine is controlled by a'. plurality of banks of value keys 101 (Fig. 1), a bank of department keys 102 (Fig. 3) and a bank of total keys 103 4(Fig. 2). The purpose of thel value keys is to control differential mechanism for operating the totalizing devices, and the type carriers of a slip printing mechanism, and the object of the department keys is to control mechanism for rotating a totalizer carrying reel to .operatively position any totalizer' with relation tothe differential y mechanism. yThe purpose of the total keys is to control the machine for printing totals or subtotals from either the main totalize'r or one of the department totalizers.

The value keys 101 are slidably mounted in key' frames 104A and are depressible against springs 105 compressed between pins 106 on the keys and fianges 107 of the key frames.

To prevent the depressiolr of more than one key at a time in any bank, the pins 106 coperate with disks 108 loosely supported at thesides of the keys between the keys'and a key detent 109. The end disks 10S have circular openings 110 through which pass pins 111 fastened to ,key frame 101 and these openings are of suchsize as to permit only slight free play between the disks, thus permitting the depression of only one key at a time.

In order to retain depressed keys in depressed position during the operation of the machine, the detents 109 are slidably mounted in the key frames 101 and are provided with a plurality of inclined slots 112 located in the path of movement of pins 106 on the eys. the plate is shifted in the direction of its length, the slots being 'inclined so as to cause the plate to move forwardly against the action of its spring 113 interposed bedetent and a lug 115 tween a lug 111 on the on corresponding frame 101. For the purpose of retainingthe detents and thus the l keys in their moved position and simultaneously releasing desired elements of the differential mechanism. pawls 116 are provided, journaled ou a shaft 117 at their rear ends which are bent into yoke form to bear on the shaft at two points. Springs 118 are extended between pins 119 on the pawls 116 and a tie bar of the machine and serve to urge the pawls to rockupwardly. Pins 120 on the pawls normally bearing on the under side of lugs 111 of the detent prevent upward rocking of the pawls unt-il the detents have been moved forwardly by depression of keys. Then the upward movement of pawls 116 serves to position pins 120 at the rear of lugs 114 and lthereby retain the detents in their forward position and consequently the depressed keys are retained-iny depressed position. Each pawl 116 is further provided with a bent flange 121 for cooperating with a pin 122 on an actuator 200 of the differential mechanism for the purpose of normally preventing operation of the actuator and permitting its operation only on the depression of `a key in its corresponding bank. f

Each bank of vkeys is provided/with a release key in order that keys which are depressed by mistake may be released without operating the machine. One of the release 'keys for the value banks is indicated `by numeral 124 in Fig. 1. The release key for department keys is indicated by numeral 125 (Fig. 3) while the release key for-the bank of total keys is indicated by the numeral 126 (Fig. .2), These keys are depressible` against the actions of springs, as are the remaming keys and are in position to engage pins 119 on the pawls 116 and thereby rock the pawls back to normal position and thus cause their pins 120 to be moved out o engagement with shoulders 111 on the key detents, permitting the detents to spring back to normal position under the action of springs 113 and thus permit the depressed keys to rise to normal position under the action ot their springs.

The construction ot the department keys and their mounting is similar to the value keys except that there `are only four keys 'in the department bank besides the release key for such bank.

r[he department keys control means tor releasing the machine for operation and *for this purpose 'the key detent 127, tor this bank, has a forwardly extending part 128 for engaging an upwardly extending arm 129 fast to a rod 130 journaled in brackets o-a tie bar 131. A latch pawl 132 fastened to rod 130 normally engages a shoulder 133 on al disk 131 tast to drive shaitt 2. A spring 135 holds latch pawl 132 in engagement with disk 131 but when a department key is depressed detent 127 in being forced forward rocks the arm 129 forward and thereby shaft 130 and through it .pawl 132 is disengaged from the disk permitting the driving mechanism ot the machine to operate.

The machine release may also be operated by depressing a total key. llhen a total is printed from the main totalizer it is not desired to depress one of the department keys. For this reason shaft 130 (Fig- 2) is provided with an arm 136 similar to arm 129 and coperating with av forward extension 137 of the detent 138 for the bank or total keys thus eecting release ot thel machine when either of the total keys is depressed.

For the purpose of releasing depressed value keys after the same have performed their required functions, during an. operation of the machine, shaft 117 (Fig. 1) is provided with a plurality of arms 139 ast to the shaft and located in position to engage the rear of pawls 116 at their yoke shaped ends and thus rock the pawls back to normal position and' permit the detents to return to normal position and the keys to rise under the action of their springs. 1n orderto rock shaft 117 at the required time,it carries fast an arm 110 (Fig. 11) provided with a pin 111. normally engaged by a notch 112 in a pitman 113 having a roller l111 extending into a groove 115 in a disk 116 tast to sha-tt I The pitman 113 is forked at its lower end to be guided by shaft 1 and at its upperA end is provided with a. slot 117 through which extends a pin 118 fast to a lever 1119 pivoted on shaft 1 and having. at its upper end a slot 150 through which extends a pinL 151 fast to the detent 13S-tor the bank ot total keys. r1`h'e pitman 113 is thus guided naoasoo in its movement by the pin 118 on lever 1/19 in order to provide means whereby the pitman may be made inoperative on the depression of total keys,-as explained farther on. llVhen the pitman 113 is drawn downwardly it rocks shaitt 117 through the arm 119 causing the arms 139 on shaft 117 (Fig. 1) vto engage the yoke shaped rear ends ot pawls 116 and thereby rock the forward ends ot the pawls downwardly out Aor engagement with the key detente, which then spring back to normal position and simultaneously permit depressed keys to return to their upper positions.

'lhe department and total Vkeys are released independently ot the value keys in order that shaft 117 may be employed at the beginning ottotal printing operations to rock `the pawls 116 (Fig. 1) downwardly Afrom their normal position as shown in this hgure tor the purpose or releasing the actuators 200. To this end, shaft 117 with respect to the department and total keys (Figs. 3 and 2) respectively is not provided with arms for restoring the pawls116 of these banks, but instead a rod 152 is provided, i

journaled in the side trames ot the machine, and having aY pair ot arms 153 located in vertical planes with and above pawls 116 cooperating vwith the department and total banks. Rod 152 (Fig. 2) carries rast an arm 151- to the forward end ot which is pivoted afpitman 155 having its lower end forked over shaft 1 to be guided thereby. rllhe pitman 155 is provided with a roller 156 eX- tending into a' groove 157 in a cam disk 158 tast to shaft 1. The cam groove is formed to draw the pitman downwardly near the end ot each rotation ot shaft 1 and accordingly at this time through arm 151 the shaft 152 is rocked counter-clockwise carrying its arms 153 into engagement with the pawls 116 tor the total and department banks (Figs. 2 and 3). ln this manner depressed keys in these banks are released independently ot the value keys. Y v

lln order that value keys may not be de pressed when one of the total printing keys 103 (Fig. 2) is depressed, the detent 138 for the total keys has a pin 188 passing through journaled inthe machine'trames and cut away at 192 (Fig. 1)' where the shaft is in the path ot movement of detents 109 for the value keys. Consequently when a total key is depressed the forward movement of detent 138 through the pin 188 rocks arm 190 counterfelockwise, thereby rocking shaft 191 so that the cut away parts ot the shaft are moved out ot the pathA or detents 109. 1t is -a slot 189 in anarm 190 :tast to a shaft 191 the rocking of the shaft. In this manner depresslon of a value kev prevents the depression of a total ke v and therefore when amounts are set on the keyboard it is implurality of amount determining actuators shown in Figs. 1 and 7. a set of racks for rotating the totalizer carrying reel and controlied by the department keys (Fig. 3),y

and devices for determining total and subtotal printing controlled by the total keys (Fig. 2). Y 3f The purpose of the differential mechanism under the control of the value keys is to differentiallyv rotate selected totalizers and position amount type carriers of the printing mechanism. ,while the purpose of the differential mechanism under the control of'the department and total keys is also to position corresponding type wheels in addition to their functions of selecting department totalizers for operation, anddete-rmining total and subtotal printing operations.

The differential mechanism under the control of the value keys comprises for each bank a pair of slides 200 and 201 having slots 202 through which pass shafts 203, 204 and 205 journaled in the frames of the machine Thus these shafts serve to guide the pairs of slides 200 and 201 in their horizontal movement. A rod 206 passes through slots 20T in the slides and is secured to the upper ends of arms 20S fastened to a shaft 209 journaled in the frames of the machine. On the. rod 206 are journaled a plurality of pinions 210 each engaging a rack. 211 on a slide 201 and il rack 212 on its companion slide 200. The arms 208 are provided with rollers 213 extending into grooves 211cut in cam disks 215 fast on drive shaft 1. Each slide 200 is provided with rack teeth 216 by means of which movement of these slides 200 is communicated to the main totalizer and to a4 selected department totalizer and to type carriers in the printing mechanism.

In operation cams 215 rock the arms 208 around the shaft 209 to carry the 'upper ends of the arms forwardly and ther return the same to the position in which they are shown in Fig. 1. The forward movement of rod 206 would. if no key were depressed., cause the pinions 210 to roll along rack'212 fast to the slide or actuator 200. as the slideI `would be retained in its normal positlon by pawl 116 engaging by fiange 121, pin 122 on the slide. This rolling movement of pinion 210 results in a forward movement of slide 201 from the teeth of pinion 210 engaging and driving rack 211. Thus the actuators 200 remain in normal position and the operation is idle if no'key has been depressed.v When a key in any bank is destant value.

pressed, the pawl 116 for such bank is permltted to spring upwardly because of the forward movement of the respective key detent 109 resulting in shoulder 114 passing` away from pin 120 on the pawl. This movement of the pawl carries flange 121 above pin 122*` and` therefore, when the arms 208 are rocked forwardly both slides 200 and 201 are carried forward until one of stepped shoulders 217 or 218 of the slides engages the shank of a Adepressed key whereupon such slide is prevented from further forward movement and its companion slide is carried forward until one of its shoulders engages the depressed key. The shoulders 21T and 21S are so positioned on the slides that the'slide 200 moves forwardly an extentcorresponding in value to the depressed key while the slide 201 moves the complement of such value. and therefore the movement of both slides is` combined. of con- For inst-ance, the shoulder on actuator 200 which coperates with the one key is normally spacedy from the key so that when moved into engagement therewith the actuator will be moved the distance ofone. tooth space of the rack 216. The corresponding shoulder on the companion plate or slide 201 is located the distance of eight of these tooth spaces away from the one key. consequently the two slides together move nine spaces. If the two key is depressed, actuator 200 will move two spaces while companion plate 201 will then move only seven spacesaff/Accordingly the movement between each pair of plates is' always complementary, the plates together always moving nine spaces. In this manner while the movement of each pair of plates is of constant value the rela.- tive ,movement between the plates may be varied as'required to perform different operations.

Fig. 3 shows in side elevation the bank of department keys and connections controlled thereby for rotating a reel 350 for the purpose of bringing one of the department totalizers 351 into operative' relation with the racks 216 on actuators 200 (Fig.

1). As shown in Fig. 3. there are four de- .Y

of the restoring movement of the slides.

Therefore in order that the slides will not uselessly return the reel to normal position at the end of each'operat-ion of the machine., the slides operate t0 position the reel d- 

